The Facebook connection?
         

<p>As previously discussed, the Chinese fake-storefront scammers who have been using other people's Hotmail accounts to send spam have also been hijacking Gmail accounts. Talking to people who have had their Gmail accounts hijacked has revealed one interesting fact: everyone we spoke to had used the same password for both Gmail and Facebook.</p>


         

http://www.spamnation.info/blog/archives/2010/07/the-facebook-connection.html